package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.service.ShoppingCartService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Primary;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;
import org.springframework.util.ObjectUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.*;

@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private WebSocketServer webSocketServer;

    @Value("${sky.shop.address}")
    private String shopAddress;

    @Value("${sky.baidu.ak}")
    private String ak;

    @Override
    @Transactional(rollbackFor = Exception.class)
    public OrderSubmitVO submit(OrdersSubmitDTO submitDTO) {

        // 1. 处理各种业务异常（地址簿为空，购物车数据为空）
        // 地址簿
        AddressBook addressBook = addressBookMapper.getById(submitDTO.getAddressBookId());
        if (ObjectUtils.isEmpty(addressBook)) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        // 判断距离 无key不测试
//        checkOutOfRange(addressBook.getProvinceName() + addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());

        // 购物车
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(userId)
                .build();
        List<ShoppingCart> shoppingCartlist = shoppingCartMapper.list(shoppingCart);
        if (CollectionUtils.isEmpty(shoppingCartlist)) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        // 2. 向订单表插入1条记录
        Orders orders = new Orders();
        BeanUtils.copyProperties(submitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setAddress(addressBook.getDetail());
        orders.setAddressBookId(addressBook.getId());
        orders.setUserId(userId);

        orderMapper.submit(orders);

        // 3. 向订单明细表插入n条记录
        List<OrderDetail> orderDetails = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartlist) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetails.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetails);

        // 4. 清空当前用户的购物车
        shoppingCartMapper.clean(userId);

        // 5. 封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .orderTime(orders.getOrderTime())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    @Override
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    @Override
    public OrderPaymentVO payZero(OrdersPaymentDTO ordersPaymentDTO) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        paySuccess(ordersPaymentDTO.getOrderNumber());

        return new OrderPaymentVO();
    }

    @Override
    public void paySuccess(String outTradeNo) {
        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        // 通过websocket向客户端发送消息 type orderId content
        HashMap<String, Object> map = new HashMap<>();
        map.put("type", 1);
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号:" + outTradeNo);

        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
    }

    @Override
    public void reminder(Long id) {

        Orders ordersDB = orderMapper.getById(id);
        if (ObjectUtils.isEmpty(ordersDB)) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        // 通过websocket向客户端发送消息 type orderId content
        HashMap<String, Object> map = new HashMap<>();
        map.put("type", 2);
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号:" + ordersDB.getNumber());

        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
    }

    @Override
    public PageResult<OrderVO> historyOrders(int pageNum, int pageSize, Integer status) {
        PageHelper.startPage(pageNum,pageSize);

        OrdersPageQueryDTO ordersDTO = new OrdersPageQueryDTO();
        ordersDTO.setStatus(status);
        ordersDTO.setUserId(BaseContext.getCurrentId());

        Page<Orders> page = orderMapper.getOrdersPage(ordersDTO);

        List<OrderVO> orderVOList = new ArrayList<>();
        if (page != null && page.getResult().size() > 0) {
            for (Orders orders : page) {
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetailList);

                orderVOList.add(orderVO);
            }
        }
        return new PageResult<>(page.getTotal(), orderVOList);
    }

    @Override
    @Transactional
    public void repetition(Long id) {
        Orders orders = orderMapper.getById(id);
        if (ObjectUtils.isEmpty(orders)) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        // 获取订单详情
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orders.getId());
        ShoppingCart shoppingCart;

        List<ShoppingCart> shoppingCartList = new ArrayList<>();

        for (OrderDetail orderDetail : orderDetails) {
            shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(orderDetail, shoppingCart, "id");
            shoppingCart.setUserId(BaseContext.getCurrentId());
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartList.add(shoppingCart);
        }
        shoppingCartMapper.insertBatch(shoppingCartList);

    }

    @Override
    public OrderVO getOrderDetail(Long id) {
        Orders orders = orderMapper.getById(id);
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orders.getId());

        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetails);
        return orderVO;
    }

    @Override
    public void cancel(Long id) {
        Orders orders = orderMapper.getById(id);

        // 校验订单是否存在
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if (orders.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 1待付款 2待接单可以取消
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelTime(LocalDateTime.now());
        orders.setCancelReason("用户取消");
        orderMapper.update(orders);

        // 2待接单 退款
        if (Orders.TO_BE_CONFIRMED.equals(orders.getStatus())) {
            // 退钱
        }
    }

    @Override
    public void cancel(OrdersCancelDTO cancelDTO) {
        Orders orders = orderMapper.getById(cancelDTO.getId());

        // 校验订单是否存在
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        // 1待付款 2待接单可以取消
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelTime(LocalDateTime.now());
        orders.setCancelReason(cancelDTO.getCancelReason());
        orderMapper.update(orders);

        // 2待接单 退款
        if (Orders.PAID.equals(orders.getPayStatus())) {
            // 退钱
        }
    }

    @Override
    public PageResult<List<OrderVO>> conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.getOrdersPage(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders ordersDB = orderMapper.getById(ordersConfirmDTO.getId());
        if (!ObjectUtils.isEmpty(ordersDB) && Objects.equals(ordersDB.getStatus(), Orders.TO_BE_CONFIRMED)) {
            orderMapper.update(Orders.builder()
                    .id(ordersConfirmDTO.getId())
                    .status(Orders.CONFIRMED)
                    .build());
        } else {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
    }

    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());
        if (!ObjectUtils.isEmpty(ordersDB) && Objects.equals(ordersDB.getStatus(), Orders.TO_BE_CONFIRMED)) {
            orderMapper.update(Orders.builder()
                    .id(ordersRejectionDTO.getId())
                    .status(Orders.CANCELLED)
                    .cancelReason(ordersRejectionDTO.getRejectionReason())
                    .cancelTime(LocalDateTime.now())
                    .build());

            // 退钱
        } else {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
    }

    @Override
    public OrderStatisticsVO statistics() {
        Integer beConfirmedCount = orderMapper.getCountByStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmedCount = orderMapper.getCountByStatus(Orders.CONFIRMED);
        Integer deliveryInProgressCount = orderMapper.getCountByStatus(Orders.DELIVERY_IN_PROGRESS);
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(beConfirmedCount);
        orderStatisticsVO.setConfirmed(confirmedCount);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgressCount);
        return orderStatisticsVO;
    }

    @Override
    public void complete(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        if (!ObjectUtils.isEmpty(ordersDB) && Objects.equals(ordersDB.getStatus(), Orders.DELIVERY_IN_PROGRESS)) {
            ordersDB.setStatus(Orders.COMPLETED);
            ordersDB.setDeliveryTime(LocalDateTime.now());
            orderMapper.update(ordersDB);
        }
    }

    @Override
    public void delivery(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        if (!ObjectUtils.isEmpty(ordersDB) && Objects.equals(ordersDB.getStatus(), Orders.CONFIRMED)) {
            ordersDB.setStatus(Orders.DELIVERY_IN_PROGRESS);
            orderMapper.update(ordersDB);
        }
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        List<OrderVO> orderVOList = new ArrayList<>();

        for (Orders orders : page.getResult()) {
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(orders, orderVO);
            String orderDishesStr = getOrderDishesStr(orders);
            orderVO.setOrderDishes(orderDishesStr);
            orderVOList.add(orderVO);
        }
        
        return orderVOList;
    }

    private String getOrderDishesStr(Orders orders) {
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orders.getId());
        StringBuilder dishesStr = new StringBuilder();
        for (OrderDetail orderDetail : orderDetails) {
            dishesStr.append(orderDetail.getName()).append("*").append(orderDetail.getNumber()).append("; ");
        }
        return dishesStr.toString();
    }

    /**
     * 检查客户的收货地址是否超出配送范围
     * @param address
     */
    private void checkOutOfRange(String address) {
        Map map = new HashMap();
        map.put("address",shopAddress);
        map.put("output","json");
        map.put("ak",ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address",address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin",shopLngLat);
        map.put("destination",userLngLat);
        map.put("steps_info","0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if(distance > 5000){
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }
}
